//-*****************************************************************************
//
// Copyright (c) 2009-2010,
//  Sony Pictures Imageworks Inc. and
//  Industrial Light & Magic, a division of Lucasfilm Entertainment Company Ltd.
//
// All rights reserved.
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// modification, are permitted provided that the following conditions are
// met:
// *       Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// *       Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// *       Neither the name of Sony Pictures Imageworks, nor
// Industrial Light & Magic, nor the names of their contributors may be used
// to endorse or promote products derived from this software without specific
// prior written permission.
//
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//-*****************************************************************************

#ifndef _Alembic_MD5Hash_Process_h_
#define _Alembic_MD5Hash_Process_h_

#include <Alembic/MD5Hash/Foundation.h>
#include <Alembic/MD5Hash/Digest.h>

namespace Alembic {
namespace MD5Hash {
namespace ALEMBIC_VERSION_NS {

//-*****************************************************************************
class Process
{
public:
    Process();
    Process( const Process &copy );
    Process& operator=( const Process &copy );

    void append( const UCHAR *data, size_t nbytes );

    MD5Digest digest() const;

protected:
    void process64bytes( const UCHAR *data )
    {
        // CJH: Always writing data as little-endian here,
        // and storing types to little-endian from elsewhere.
        process64bytesLE( data );
    }

    void process64bytesLE( const UCHAR *data );
    void process64bytesBE( const UCHAR *data );
    void process64bytesAligned( const UINT4 *data );
    MD5Digest unrecoverableBakeIntoDigest();

    size_t m_count[2];
    UINT4 m_abcd[4];
    UCHAR m_buf[64];
};

} // End namespace ALEMBIC_VERSION_NS

using namespace ALEMBIC_VERSION_NS;

} // End namespace MD5Hash
} // End namespace Alembic

#endif
